This is what the Bazooka Forum is for Rod. Have no fear or worries about the FAST system. Again, there will be no introduced noise into the system. When connecting to the battery of your vehicle, you will then want to keep the power wire seperate, as the current draw is higher, not to mention, the battery itself acts much like a noise filter for the alternator and you car's electrical system. Also remember, using Low Level Inputs, you usually have a very low voltage, 2-4 volts. There is a reason that Line Drivers have become popular, and it is because you are raising the voltage to 6,8, even 10 volts sometimes, which allows your Low Level Interconnects to reject noise. With the FAST, you are using the High Level Inputs of the Tube, by tapping into the speaker outputs. What this means is that you are sending a High Voltage Signal to the Tube, and remember, this rejects noise. Coupled with the minimal current draw on the BTA6100, and you will have no noise introduced into the system.